Comparison

BMI Calculator・Weight Tracker vs Zelia

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

BMI Calculator・Weight Tracker

Easily calculate your Body Mass Index (BMI) and track your weight progress. Visualize your trends with graphs, gain predictive insights, and set goals for your health journey. Supports metric and imperial systems, with Apple Watch integration.

Highlights
  • BMI Calculation
  • Weight Tracking
  • Metric and Imperial Systems
  • Apple Watch Integration
  • Graphs and Stats
  • Predictive Insights
Features
Read full description

Calculate your BMI (Body Mass Index) and monitor your weight with our user-friendly app. Whether you’re on a weight loss journey or aiming to maintain a healthy weight, our app provides essential tools to help you reach your goals. Key Features: • BMI Calculation: Easily calculate your BMI using your height and weight. • Metric and Imperial Systems: Choose your preferred measurement system for accurate results. • Weight Tracking: Log your weight regularly to track your progress over time. • Apple Watch Integration: Sync your weight data with Apple Watch for seamless tracking and analysis. • Beautiful Graphs and Stats: Visualize your weight trends with clear graphs and insightful statistics. • Predictive Insights: Understand your true weight trend, predict future weights, and set commitment goals. The BMI Calculator and Weight Loss is free to download and utilize. However, users can opt for a subscription to access additional features. Your subscription will automatically renew and you’ll be billed based on the plan you choose. You can cancel your subscription at any time in the App Store. Disclaimer: Our BMI Calculator is not intended for medical diagnostics. Always consult a healthcare professional before making any health-related decisions. Terms of use: https://aboutmeapps.com/terms-of-use.html Privacy policy: https://aboutmeapps.com/privacy-policy.html

About

Zelia

Features
Read full description

Zelia is your AI health companion — built for people managing a chronic condition, a weight-loss journey, or both at once. No medical degree required. Just clear, sourced answers and a system that remembers your context so you don't have to repeat yourself. MEDICATIONS, MADE SIMPLE • Smart reminders for every dose, with lock screen and widget confirmation • Scan a label, a Webster pack, or an eScript — Zelia reads it for you • Drug and food interaction checking against RxNav and FDA/ACSQHC sources • Refill and repeat tracking so you're never caught out WEIGHT LOSS SUPPORT — BARIATRIC SURGERY & GLP-1 MEDICATIONS • Track weight, body measurements and body composition over time • Log GLP-1 injections (Ozempic, Wegovy, Mounjaro, Zepbound and more) with dose titration history • Bariatric surgery timeline — know exactly what stage of your recovery diet you're in • Dumping syndrome and side-effect logging, matched to your actual recovery stage • Supplement timing checks (calcium, iron, B12 and more) built for post-surgical absorption • Follow your own surgeon's diet plan — scan or paste it in and Zelia follows it, not a generic timeline • Non-scale victories, hydration tracking and progress photos that never leave your device BUILT FOR REAL APPOINTMENTS • AI-generated pre-appointment briefings with your real trends — heart rate, blood pressure, weight, sleep, adherence • Export a clean PDF summary to bring to your doctor, specialist or pharmacist • Save questions and notes as they come to you, review and clear them before your visit ZELIA IS FREE TO USE Track your medications, log symptoms, vitals, weight, GLP-1 injections and hydration, and store your appointments and progress photos — all free, with no time limit. Nothing you log is ever locked away from you. ZELIA PRO — 14-day free trial included Unlocks the full AI health companion: unlimited chat with Zelia, camera scanning for medication labels and eScripts, AI-generated pre-appointment briefings with PDF export, drug/food/supplement interaction checking, advanced health trend charts (HRV, blood pressure, SpO2, AFib), and family/carer sharing. A$8.99/month or A$79.99/year after the trial. DESIGNED TO STAY IN ITS LANE Zelia never diagnoses, never changes your medication or dose, and never replaces your care team. Every piece of clinical information is sourced — TGA, ACSQHC, RxNav, FDA, ASMBS and equivalent regional bodies — and cited so you can check it yourself. If something looks urgent, Zelia tells you to seek care, plainly and immediately. PRIVACY FIRST Your name never leaves your device. Progress photos are stored only in Zelia's private, on-device storage — never your Photos app, never uploaded anywhere. Health data you choose to share with Zelia's AI is used only to answer you, not to build an ad profile. Whether you're managing a heart condition, diabetes, a bariatric recovery, a GLP-1 titration schedule, or all of the above, Zelia adapts to you — not the other way around. This app uses the standard Apple End User License Agreement (EULA), which can be found at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

BMI Calculator・Weight Tracker4 screens
Zelia4 screens

Verdict

The call

The clearest difference is update cadence: Zelia at every 8 days against BMI Calculator・Weight Tracker's every 2 months. BMI Calculator・Weight Tracker's advantage is iOS requirement (14.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. BMI Calculator・Weight Tracker sells 5 in-app purchases, starting at $9.99 per month and Zelia sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

BMI Calculator・Weight Tracker ships an update every 2 months, Zelia every 8 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
BMI Calculator・Weight Tracker versus Zelia: the parameters behind the verdict, then further details
ParameterBMI Calculator・Weight TrackerZelia
PriceFreeFree
Rating4.8 (517 ratings) — better—
Positive reviews84.0% of reviews—
Number of ratings517 — better—
Update frequencyEvery 2 monthsEvery 8 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPad
Requires iOS14.0 — better16.4
Further details — not scored
Size53 MB38 MB
Age rating17+12+
DeveloperAboutMe Apps, Inc.Lovara & Co

Bugs and requests

BMI Calculator・Weight Tracker

Reported bugs

4 issues
  • App stopped working after June 2024 update
  • Crashes on iPad Air (5th Generation) with iOS 17.5.1
  • Unable to open app on latest iOS versions
  • App fails to launch after recent updates

Requested features

2 requests
  • Restore different color options for tracking
  • More sensitive language for BMI categorization

Zelia

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

BMI Calculator・Weight Tracker

Subscriptions5
  • Monitor your weight & progress$9.991 Month
  • Monthly Premium$9.991 Month
  • Predict your future weight+BMI7 Days trial$19.991 Year
Show 2 more
  • Premium Year$19.991 Year
  • Premium 3 Months$19.993 Months
2 purchases

Zelia

Subscriptions2
  • Zelia Pro Monthly14 Days trial$5.991 Month
  • Zelia Pro Annual14 Days trial$49.991 Year

Questions

Is BMI Calculator・Weight Tracker free?
BMI Calculator・Weight Tracker is free to download, with in-app purchases available.
Is Zelia free?
Zelia is free to download, with in-app purchases available.
Do BMI Calculator・Weight Tracker or Zelia have ads?
Neither BMI Calculator・Weight Tracker nor Zelia shows ads.
Which is updated more often, BMI Calculator・Weight Tracker or Zelia?
BMI Calculator・Weight Tracker ships an update every 2 months, and Zelia every 8 days. Most recently, BMI Calculator・Weight Tracker was updated on November 3, 2026 and Zelia on October 31, 2026.

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